@article{GDZPPN002078023, title = {The Planarity of the Equilateral, Isogonal Pentagon.}, journal = {Elemente der Mathematik}, volume = {27}, year = {1972}, pages = {25-32}, zbl = {0236.50003}, url = {http://dml.mathdoc.fr/item/GDZPPN002078023} }
Dunitz, J.D.; Waser, J. The Planarity of the Equilateral, Isogonal Pentagon.. Elemente der Mathematik, Tome 27 (1972) pp. 25-32. http://gdmltest.u-ga.fr/item/GDZPPN002078023/